Must have a valid picture ID to play at the terminals. ... I sense I'm wrong.

We aren't a free translation service. But, since you provided your own attempt, I've provided some hints below.

Quote:

Originally Posted by rickwtx

La seguridad(Why is this in your translation? 'Security/Safety' doesn't exist in the original.)

Se debe tener(I added the impersonal subject pronoun 'One', just to make your translation more complete.)

un formulario válido deuna identificación(You used the wrong word for 'form', as in "a form of identification." The word 'form' isn't in the original, so don't try to translate it.
I reminded you to use an indefinite article before the word 'identificación'.
After 'identificación', include the Spanish word for 'valid', but make sure its gender agrees with the noun it modifies.)

del cuadro(Here you've chosen the wrong word for picture. Use the shortened word for 'photograph' instead. This word will follow the preposition 'con' instead of 'del'.)

() los terminales(Replace the parentheses with the translation of 'to play at', using the preposition 'para' for the word 'to'. Check the gender of the noun.)